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Windows Analysis Report


General Information

Sample Name:doc_65398086_4190362045539.pdf.vbs
Analysis ID:625179


AgentTesla, GuLoader, Remcos
Range:0 - 100


Yara detected AgentTesla
Antivirus detection for URL or domain
Yara detected GuLoader
Found malware configuration
Multi AV Scanner detection for submitted file
Yara detected Telegram RAT
Yara detected Remcos RAT
Multi AV Scanner detection for domain / URL
Tries to steal Mail credentials (via file / registry access)
Creates multiple autostart registry keys
Tries to detect Any.run
Wscript starts Powershell (via cmd or directly)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Encrypted powershell cmdline option found
Tries to steal Mail credentials (via file registry)
Uses the Telegram API (likely for C&C communication)
Injects a PE file into a foreign processes
Uses an obfuscated file name to hide its real file extension (double extension)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Uses dynamic DNS services
Tries to harvest and steal browser information (history, passwords, etc)
Installs a global keyboard hook
Writes to foreign memory regions
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to harvest and steal ftp login credentials
Potential malicious VBS script found (has network functionality)
Very long command line found
Yara detected WebBrowserPassView password recovery tool
C2 URLs / IPs found in malware configuration
Tries to steal Instant Messenger accounts or passwords
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Very long cmdline option found, this is very uncommon (may be encrypted or packed)
May sleep (evasive loops) to hinder dynamic analysis
Uses code obfuscation techniques (call, push, ret)
Detected potential crypto function
Sample execution stops while process was sleeping (likely an evasion)
Contains functionality to check the parent process ID (often done to detect debuggers and analysis systems)
JA3 SSL client fingerprint seen in connection with other malware
Contains functionality to dynamically determine API calls
HTTP GET or POST without a user agent
Contains long sleeps (>= 3 min)
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Java / VBScript file with very long strings (likely obfuscated code)
Drops PE files
Tries to load missing DLLs
Uses a known web browser user agent for HTTP communication
Checks if the current process is being debugged
Compiles C# or VB.Net code
Found large amount of non-executed APIs
Creates a process in suspended mode (likely to inject code)
Contains functionality for read data from the clipboard
Queries the volume information (name, serial number etc) of a device
Yara signature match
Found potential string decryption / allocating functions
Yara detected Credential Stealer
Contains functionality to call native functions
Found dropped PE file which has not been started or loaded
IP address seen in connection with other malware
Enables debug privileges
Extensive use of GetProcAddress (often used to hide API calls)
Detected TCP or UDP traffic on non-standard ports
Creates a window with clipboard capturing capabilities
Queries sensitive processor information (via WMI, Win32_Processor, often done to detect virtual machines)
Found WSH timer for Javascript or VBS script (likely evasive script)